x³+x²+16 x³ x² 16f⁾(x) = (-------------- )⁾ = (------ + --------- + --------)⁾ =(x²+x +16/x)⁾ = x x x x 0*x - 1*16 16= 2x²⁻¹ +1 + ----------------- = 2x+1 - ------- x² x² 2x+1- (16/x²) =1 2x*x²- (16/x²) *x²=0 2x³- 16 =02x³ =16x³=8x=∛8=2 x∛x +3x +18 x∛x 3x 18f⁾(x) = (---------------------)⁾=(-------- +---------- + --------- )⁾ = ∛x ∛x ∛x ∛x 18 0*∛x - 18* (1/3)*x¹/³⁻¹ = (x + 3∛x² + --------)⁾ =1 +3*(2/3)*x ²/³ ⁻¹ + ------------------------------- = ∛x ∛x² 6 *x⁻²/³ 2 6 2 6= 1+2*x⁻¹/³ - -------------- = 1+ --------- - ------------- = 1 + ------ - ------- = ∛x² ∛x ∛x² * ∛x² ∛x ∛x⁴ 2 6= 1 + ------- - --------- ∛x x∛x 2 6 1 + ------- - --------- =1 ∛x x∛x 2 6 ------- - --------- =0 ∛x x∛x 2x - 6 ------------ =0 ОДЗ х≠0 x∛x2х-6=0 х=3